The Weiler Street Broom features bristles made from bass and Palmyra blend for heavy-duty cleaning on rough surfaces.Keep all asphalt surfaces clean with the Weiler Hardwood Broom that features hard bristles. With fibers made of bass and Palmyra blend, this brush is good for cleaning sweeping streets or parking lots. The bristles are wide-flared to make sweeping close to walls and curbs convenient.to walls and curbs convenient.